which manga is the Fenrir one?
I kinda like this type of manga, I saw the:
Behemot one - I Am Behemoth Of The S Rank Monster, But I Am Mistaken As A Cat And I Live As A Pet Of Elf Girl
Dragon one - Reincarnated as a Dragon's Egg - Let's Aim to be the Strongest
Spider one - Kumo Desu ga, Nani ka?